Final answer:
The depreciation equations for the Zelot and Nile trucks are D(t) = $250,000 - $18,000t and D(t) = $205,000 - $12,000t, respectively, which can be used to determine which truck is the better value based on depreciation over time.
Step-by-step explanation:
To write an equation for the depreciation of each truck over time, we would use the straight-line depreciation method. The depreciation equation for a truck can be described as:
D(t) = P - rt
Where D(t) is the value of the truck after t years, P is the initial purchase price, and r is the rate of depreciation per year.
Zelot Truck Depreciation
Initial Purchase Price (P): $250,000
Annual Depreciation (r): $18,000
Depreciation Equation: D(t) = $250,000 - $18,000t
Nile Truck Depreciation
Initial Purchase Price (P): $205,000
Annual Depreciation (r): $12,000
Depreciation Equation: D(t) = $205,000 - $12,000t
Using these equations, the company can compare the value of the trucks over time to determine which truck is the better value for purchasing based on their depreciation rates.